do we use the corn fields to grow more food or cleaner fuel? or do we wrestle with the trick here problem of demand? if we are to support more and more people, we may each have to consume less and be less wasteful. 40% of food in the united states is never eaten, simply thrown away. the security of our food system is threatened by restrictions on supply and ever-increasing demand. just one not in the system could send prices rocketing. but how do we increase supply and demand and that will require tough decisions. it was a hard night for nebraska, but they fought back, winning 30-27. 85,000 people went home happy. but it promises to be a tough all time. artists are down, and unless there is significant -- harvests are down, and unless there is significant rainfall in snow over the winter, the spring will be even tougher. >> earlier this week, my colleague spoke with the shaft and author, a plant biologist, and an author, anti-waste campaigner and self-styled scavenger about whether we are really at the end of the era of cheap food. >> we are ap